From 88192facdb334d6b4fa4b9b98aebe6dbd0d09673 Mon Sep 17 00:00:00 2001 From: Piotr Dorobisz Date: Wed, 9 Mar 2011 14:04:37 +0100 Subject: Added missing ttb_autostart.erl --- lib/runtime_tools/src/ttb_autostart.erl | 55 +++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 lib/runtime_tools/src/ttb_autostart.erl (limited to 'lib/runtime_tools/src') diff --git a/lib/runtime_tools/src/ttb_autostart.erl b/lib/runtime_tools/src/ttb_autostart.erl new file mode 100644 index 0000000000..4c6971c119 --- /dev/null +++ b/lib/runtime_tools/src/ttb_autostart.erl @@ -0,0 +1,55 @@ +%%%------------------------------------------------------------------- +%%% File : ttb_autostart.erl +%%% Author : Bartłomiej Puzoń +%%% Description : This supervisor is used to resume ttb tracing +%%% Users are able to provide custom restart modules for *_config, as +%%% file:write/read/delete may not be possible on diskless nodes. +%%% +%%% Created : 31 Jul 2010 by +%%%------------------------------------------------------------------- +-module(ttb_autostart). + +-behaviour(gen_server). + +%% API +-export([start_link/0, + read_config/0, + write_config/1, + delete_config/0]). + +%% gen_server callbacks +-export([init/1, handle_call/3, handle_cast/2, handle_info/2, + terminate/2, code_change/3]). + +-define(DEF_AUTOSTART_MODULE, ?MODULE). +-define(AUTOSTART_FILENAME, "ttb_autostart.bin"). + +start_link() -> + gen_server:start_link(?MODULE, no_args, []). + +delete_config() -> + file:delete(?AUTOSTART_FILENAME). + +read_config() -> + case file:read_file(?AUTOSTART_FILENAME) of + {ok, Data} -> {ok, binary_to_term(Data)}; + Error -> Error + end. + +write_config(Data) -> + file:write_file(?AUTOSTART_FILENAME, term_to_binary(Data)). + +init(no_args) -> + case application:get_env(runtime_tools, ttb_autostart_module) of + {ok, _} -> ok; + undefined -> application:set_env(runtime_tools, ttb_autostart_module, ?DEF_AUTOSTART_MODULE) + end, + observer_backend:ttb_resume_trace(), + %%As the process is not needed any more, it will shut itself down + {ok, no_args, 10000}. + +handle_call(_,_,_) -> {noreply, no_args}. +handle_cast(_,_) -> {noreply, no_args}. +handle_info(timeout,_) -> {stop, normal, no_args}. +terminate(_,_) -> ok. +code_change(_,_,_) -> {ok, no_args}. -- cgit v1.2.3